| /* GStreamer |
| * |
| * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net> |
| * 2006 Edgard Lima <edgard.lima@gmail.com> |
| * |
| * gstv4l2.c: plugin for v4l2 elements |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #ifndef _GNU_SOURCE |
| # define _GNU_SOURCE /* O_CLOEXEC */ |
| #endif |
| |
| #include "gst/gst-i18n-plugin.h" |
| |
| #include <gst/gst.h> |
| |
| #include <fcntl.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "ext/videodev2.h" |
| #include "v4l2-utils.h" |
| |
| #include "gstv4l2object.h" |
| #include "gstv4l2src.h" |
| #include "gstv4l2sink.h" |
| #include "gstv4l2radio.h" |
| #include "gstv4l2videodec.h" |
| #include "gstv4l2h263enc.h" |
| #include "gstv4l2h264enc.h" |
| #include "gstv4l2mpeg4enc.h" |
| #include "gstv4l2vp8enc.h" |
| #include "gstv4l2vp9enc.h" |
| #include "gstv4l2deviceprovider.h" |
| #include "gstv4l2transform.h" |
| |
| /* used in gstv4l2object.c and v4l2_calls.c */ |
| GST_DEBUG_CATEGORY (v4l2_debug); |
| #define GST_CAT_DEFAULT v4l2_debug |
| |
| #ifdef GST_V4L2_ENABLE_PROBE |
| /* This is a minimalist probe, for speed, we only enumerate formats */ |
| static GstCaps * |
| gst_v4l2_probe_template_caps (const gchar * device, gint video_fd, |
| enum v4l2_buf_type type) |
| { |
| gint n; |
| struct v4l2_fmtdesc format; |
| GstCaps *caps; |
| |
| GST_DEBUG ("Getting %s format enumerations", device); |
| caps = gst_caps_new_empty (); |
| |
| for (n = 0;; n++) { |
| GstStructure *template; |
| |
| memset (&format, 0, sizeof (format)); |
| |
| format.index = n; |
| format.type = type; |
| |
| if (ioctl (video_fd, VIDIOC_ENUM_FMT, &format) < 0) |
| break; /* end of enumeration */ |
| |
| GST_LOG ("index: %u", format.index); |
| GST_LOG ("type: %d", format.type); |
| GST_LOG ("flags: %08x", format.flags); |
| GST_LOG ("description: '%s'", format.description); |
| GST_LOG ("pixelformat: %" GST_FOURCC_FORMAT, |
| GST_FOURCC_ARGS (format.pixelformat)); |
| |
| template = gst_v4l2_object_v4l2fourcc_to_structure (format.pixelformat); |
| |
| if (template) { |
| GstStructure *alt_t = NULL; |
| |
| switch (format.pixelformat) { |
| case V4L2_PIX_FMT_RGB32: |
| alt_t = gst_structure_copy (template); |
| gst_structure_set (alt_t, "format", G_TYPE_STRING, "ARGB", NULL); |
| break; |
| case V4L2_PIX_FMT_BGR32: |
| alt_t = gst_structure_copy (template); |
| gst_structure_set (alt_t, "format", G_TYPE_STRING, "BGRA", NULL); |
| default: |
| break; |
| } |
| |
| gst_caps_append_structure (caps, template); |
| |
| if (alt_t) |
| gst_caps_append_structure (caps, alt_t); |
| } |
| } |
| |
| return gst_caps_simplify (caps); |
| } |
| |
| static gboolean |
| gst_v4l2_probe_and_register (GstPlugin * plugin) |
| { |
| GstV4l2Iterator *it; |
| gint video_fd = -1; |
| struct v4l2_capability vcap; |
| guint32 device_caps; |
| |
| it = gst_v4l2_iterator_new (); |
| |
| while (gst_v4l2_iterator_next (it)) { |
| GstCaps *src_caps, *sink_caps; |
| gchar *basename; |
| |
| if (video_fd >= 0) |
| close (video_fd); |
| |
| video_fd = open (it->device_path, O_RDWR | O_CLOEXEC); |
| |
| if (video_fd == -1) { |
| GST_DEBUG ("Failed to open %s: %s", it->device_path, g_strerror (errno)); |
| continue; |
| } |
| |
| memset (&vcap, 0, sizeof (vcap)); |
| |
| if (ioctl (video_fd, VIDIOC_QUERYCAP, &vcap) < 0) { |
| GST_DEBUG ("Failed to get device capabilities: %s", g_strerror (errno)); |
| continue; |
| } |
| |
| if (vcap.capabilities & V4L2_CAP_DEVICE_CAPS) |
| device_caps = vcap.device_caps; |
| else |
| device_caps = vcap.capabilities; |
| |
| if (!((device_caps & (V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE)) || |
| /* But legacy driver may expose both CAPTURE and OUTPUT */ |
| ((device_caps & |
| (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_CAPTURE_MPLANE)) && |
| (device_caps & |
| (V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE))))) |
| continue; |
| |
| GST_DEBUG ("Probing '%s' located at '%s'", |
| it->device_name ? it->device_name : (const gchar *) vcap.driver, |
| it->device_path); |
| |
| /* get sink supported format (no MPLANE for codec) */ |
| sink_caps = gst_caps_merge (gst_v4l2_probe_template_caps (it->device_path, |
| video_fd, V4L2_BUF_TYPE_VIDEO_OUTPUT), |
| gst_v4l2_probe_template_caps (it->device_path, video_fd, |
| V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)); |
| |
| /* get src supported format */ |
| src_caps = gst_caps_merge (gst_v4l2_probe_template_caps (it->device_path, |
| video_fd, V4L2_BUF_TYPE_VIDEO_CAPTURE), |
| gst_v4l2_probe_template_caps (it->device_path, video_fd, |
| V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)); |
| |
| /* Skip devices without any supported formats */ |
| if (gst_caps_is_empty (sink_caps) || gst_caps_is_empty (src_caps)) { |
| gst_caps_unref (sink_caps); |
| gst_caps_unref (src_caps); |
| continue; |
| } |
| |
| basename = g_path_get_basename (it->device_path); |
| |
| if (gst_v4l2_is_video_dec (sink_caps, src_caps)) { |
| gst_v4l2_video_dec_register (plugin, basename, it->device_path, |
| sink_caps, src_caps); |
| } else if (gst_v4l2_is_video_enc (sink_caps, src_caps, NULL)) { |
| if (gst_v4l2_is_h264_enc (sink_caps, src_caps)) |
| gst_v4l2_h264_enc_register (plugin, basename, it->device_path, |
| sink_caps, src_caps); |
| |
| if (gst_v4l2_is_mpeg4_enc (sink_caps, src_caps)) |
| gst_v4l2_mpeg4_enc_register (plugin, basename, it->device_path, |
| sink_caps, src_caps); |
| |
| if (gst_v4l2_is_h263_enc (sink_caps, src_caps)) |
| gst_v4l2_h263_enc_register (plugin, basename, it->device_path, |
| sink_caps, src_caps); |
| |
| if (gst_v4l2_is_vp8_enc (sink_caps, src_caps)) |
| gst_v4l2_vp8_enc_register (plugin, basename, it->device_path, |
| sink_caps, src_caps); |
| |
| if (gst_v4l2_is_vp9_enc (sink_caps, src_caps)) |
| gst_v4l2_vp9_enc_register (plugin, basename, it->device_path, |
| sink_caps, src_caps); |
| } else if (gst_v4l2_is_transform (sink_caps, src_caps)) { |
| gst_v4l2_transform_register (plugin, basename, it->device_path, |
| sink_caps, src_caps); |
| } |
| /* else if ( ... etc. */ |
| |
| gst_caps_unref (sink_caps); |
| gst_caps_unref (src_caps); |
| g_free (basename); |
| } |
| |
| if (video_fd >= 0) |
| close (video_fd); |
| |
| gst_v4l2_iterator_free (it); |
| |
| return TRUE; |
| } |
| #endif |
| |
| static gboolean |
| plugin_init (GstPlugin * plugin) |
| { |
| const gchar *paths[] = { "/dev", "/dev/v4l2", NULL }; |
| const gchar *names[] = { "video", NULL }; |
| |
| GST_DEBUG_CATEGORY_INIT (v4l2_debug, "v4l2", 0, "V4L2 API calls"); |
| |
| /* Add some depedency, so the dynamic features get updated upon changes in |
| * /dev/video* */ |
| gst_plugin_add_dependency (plugin, |
| NULL, paths, names, GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_PREFIX); |
| |
| if (!gst_element_register (plugin, "v4l2src", GST_RANK_PRIMARY, |
| GST_TYPE_V4L2SRC) || |
| !gst_element_register (plugin, "v4l2sink", GST_RANK_NONE, |
| GST_TYPE_V4L2SINK) || |
| !gst_element_register (plugin, "v4l2radio", GST_RANK_NONE, |
| GST_TYPE_V4L2RADIO) || |
| !gst_device_provider_register (plugin, "v4l2deviceprovider", |
| GST_RANK_PRIMARY, GST_TYPE_V4L2_DEVICE_PROVIDER) |
| /* etc. */ |
| #ifdef GST_V4L2_ENABLE_PROBE |
| || !gst_v4l2_probe_and_register (plugin) |
| #endif |
| ) |
| return FALSE; |
| |
| #ifdef ENABLE_NLS |
| bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); |
| bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); |
| #endif /* ENABLE_NLS */ |
| |
| return TRUE; |
| } |
| |
| GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, |
| GST_VERSION_MINOR, |
| video4linux2, |
| "elements for Video 4 Linux", |
| plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) |